??? 45DEG LR ???? ?????? ???????? ???????? ???????

????? 45DEG LR ?????? ?? ???? Shijiazhuang Deye Piping Industries Co.,Ltd. ?? ???? ???? ?????? ???? ?????? ???????? ????????. ????? ?? ???? ????? ??????? ???? ??? ????? ?????? ????? ??????? ??????? ?? ??????? ?? ??????? ???? ???? ????????? ??? ?? ????? ??? ????? 45DEG LR ???? ????? ????? ????? ?????? ?????? ??? ???? ???????? ????? ??????? ???????. ??? ????? ??????? ????? ?? ????????? ?? ????? ????????? ??? ?? ??? ????? ?????? ??????????????? ??????????? ?????? ?????? ????? ?? ???? ???? ????? ??????? ??????? ???????? ??????? ?? ????? ??? LR ??? ?????? ???? ??????? ??????? ????? ???? ????? ?????. ??? ??? ??????? ?????? ??????? ????? ??????? ???? ????? ????? ????????? ???? ??? ??? ??????? ?????? ?? ????? ?????? ??? ??? 45DEG LR ?? ???? Shijiazhuang Deye Piping Industries Co.,Ltd. ?? ???? ???? ???????? ???? ????????? ???? ???????? ????? ??. ???? ??? ????? ???? ?????? ????? ?????? ????? ??????? ?? ??????? ????????